Question

a bar magnet is dropped through a loop of wire

a. what is the direction of the current as the magnet enters the loop from the top?

b. what is the direcion of the current as the magnet as it leaves the loop from the bottom?

c. what is the direction of the current at the instant it is in the middle?

Answer 1

a)

clockwise seen from the top

b)

anti clock wise as seen from the top

c)

no current

explanation

the induced current is in such a direction that it opposes the motion of the falling magnet.

When viewed from above , the loop,s circular surface must be south pole so that south pole opposes the south pole of the falling magnet.
The induced current is clockwise as viewed from above.

After passing the loop the north pole of the magnet is moving away from the loop. The current opposes this. The face of the loop underneath should be south so that it attracts the falling magnet.
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The upper face of the loop must be north. The current is reversed i.e anticlockwise.